The thing i love the most about this drama: Each character showed us a different face of mankind.

Yohan shout out to us that as long as we stay silent about injustices we are no different from other corrupt people. That's why he chose to be the devil rather than being a silent hypocrite under "good person" mask, even if it makes him the scapegoat.

Gaon showed us the consequences of acting ignorantly. We saw through him that sometimes our conscience blinds us.

Sunah said man's worst enemy is himself. That's why she never loved herself, she always wanted more, but she was never happy. Because she couldn't win her war with herself. She thought she wanted Yohan's love, but what she really wanted was to feel like someone worthy of love.

Soohyun made us understand what we saw may not be true and what we think is wrong may not be wrong at all. We shouldn't act depending only our prejudice.

*opinions about ending from here -implicit spoilers-*

Some people found the show extreme, but it was actually so realistic. It was far from ordinary. You just need to look at it from a different perspective. Not everyone suddenly became a "good" person from villain. Not the system suddenly changed well. Not everything suddenly became peaceful at the end.

There was a war, it was fought, it was won.

But as in real life, years must pass after wars so that mankind can learn a lesson and do better. I couldn't have imagined a better finale than this.